package com.hp.test.interview.array;

/**
 * http://www.geeksforgeeks.org/check-if-array-elements-are-consecutive/
 */
public class CheckIfArrayElementsAreConsecutive {

    public static void main(String args[]) {
        int input[] = {76, 78, 76, 77, 73, 74};
        CheckIfArrayElementsAreConsecutive cia = new CheckIfArrayElementsAreConsecutive();
        System.out.println(cia.areConsecutive(input));
    }

    public boolean areConsecutive(int input[]) {
        int min = Integer.MAX_VALUE;
        for (int i = 0; i < input.length; i++) {
            if (input[i] < min) {
                min = input[i];
            }
        }
        for (int i = 0; i < input.length; i++) {
            if (Math.abs(input[i]) - min >= input.length) {
                return false;
            }
            if (input[Math.abs(input[i]) - min] < 0) {
                return false;
            }
            input[Math.abs(input[i]) - min] = -input[Math.abs(input[i]) - min];
        }
        for (int i = 0; i < input.length; i++) {
            input[i] = Math.abs(input[i]);
        }
        return true;
    }
}
